525249999 has 6 divisors (see below), whose sum is σ = 758694456. Its totient is φ = 350166660.

The previous prime is 525249997. The next prime is 525250009. The reversal of 525249999 is 999942525.

525249999 is a `hidden beast` number, since 525 + 24 + 9 + 9 + 99 = 666.

It is not a de Polignac number, because 525249999 - 2¹ = 525249997 is a prime.

It is a super-2 number, since 2×525249999² = 551775122899000002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525249997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29180547 + ... + 29180564.

It is an arithmetic number, because the mean of its divisors is an integer number (126449076).

Almost surely, 2^525249999 is an apocalyptic number.

525249999 is a deficient number, since it is larger than the sum of its proper divisors (233444457).

525249999 is a wasteful number, since it uses less digits than its factorization.

525249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58361117 (or 58361114 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 525249999 is about 22918.3332509151. Note that the first 3 decimals coincide. The cubic root of 525249999 is about 806.8423520728.

The spelling of 525249999 in words is "five hundred twenty-five million, two hundred forty-nine thousand, nine hundred ninety-nine".